USB battery packs are my favorite generic holiday gift. They're useful to literally everyone, they offer a tremendous amount of utility for a modest amount of money, and it still seems like most non-nerds aren't fully aware that they exist. If you have anyone on your shopping list that could use one, here's a great deal.
Today on Amazon, three of Anker's largest power packs are heavily discounted for the holidays. Anker makes some of the highest-rated batteries on the market, and several of them are actually among the most popular items we've ever listed, Lifehacker Hive Five winners, and in Lifehacker's Gift Guide, so buy with confidence.
Update: The E4 and E6 codes have expired. The E5 still seems to be working.
Anker 2nd Gen Astro E4 High Capacity 13000mAh Power Bank ($24) | Amazon | Promo code ANKEREE4
Anker 2nd Gen Astro E5 16000mAh Portable Charger External Battery Power Bank ($30) | Amazon | Promo code ANKRPPE5
Anker Astro E6 Ultra-High Capacity 20800mAh 3-Port Power Bank ($42) | Amazon | Promo code ANKRCWE6
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